Suburbazine

Well, since I need a new engine I figured I would do a 6.0 swap. I am wanting to transfer as much stuff from my 5.3 as I can, including the 862 heads. I am planning on going with forged pistons (suggestions?) and possibly a bore job if it would be worthwhile. I am also planning to carry over the current cam if not damaged since I have no desire to spin beyond 6K anyway. I also have plans in the future to go with 8-12 pounds of turbo boost.

Now, I saw the thread below and my build is different from that one, so I'd love to pick some brains here on the subject.

What do you think I need to get the job done? I know the 862's will bump compression up to 10.5 to 11:1 depending on the pistons, this is a 93 -115 octane truck that is a daily driver. I am getting a 6.0 block and crank from the machine shop that will be doing most of the work. I know I need to source some injectors (60-80lbs? suggestions?)

low2001gmc

iTrader: (137)

need more info....such as intake youre using. if not using a tbss/nnbs intake, that would be an upgrade. how about valve size on the 862s. at least 2.00 and 1.55 would be an upgrade. as for injectors, if n/a, some ls3 42lbs or flex fuel 34 lbs would be more than sufficient.

53bowtie

iTrader: (6)

Why swap the heads? If you get a 6.0 with 317's they will flow better than the 862's and be more boost friendly for your future turbo plans.....I dont get it

Edit: Just read your sig. I guess it depends on the pistons you get as to whether or not you will be able to run those heads. Not sure what compression ratio you could get away with at 12psi and 115 fuel.

Suburbazine

I may use less boost, maybe 6-8psi when I go turbo since CR will be an issue. Not looking for any stupid amounts of power output in boost configuration.

Do the power gains from having higher CR on N/A offset the reduced capability for turbocharging? The way I keep putting off the turbo it might be a while before I actually go ahead with it. So basically, on N/A, can I make better power under 6000rpm with the 862's or 317's?

I am hoping to keep the current OE intake if possible for right now, then switch to a TBSS intake in the near future.

grm1738

i did a similar project.. i swaped from a 5.3 to a stroked 6.0.. i keep my heads but had them re worked and all new valve and springs to work with my cam and crank... you said you wanted to stay with your current cam cam.. because the 6.0 is bigger it will eat up some of the current cam duration you currently have just keep that in mind... heads do make a good bit of difference in this case.. if money is not a big concern go with the lL92s and have them reworked.. but which ever you decied make sure you do it before you pick your pistons. cause the heads will change your compresson ratio and affect you when you boost it.. i am having this issue now.. i waited to do the L92s and built my motor for 15-20lb... well if i go to the L92s now i will have to change my pistions that i jsut had put in.. SO pic what you want as an end result before you build and stick to it....

grm1738

as far as pistons i used keith black with steel rings.